|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Asteroidea - Valvatida - Chaetasteridae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|H Hess 1970||Arms rounded. Superomarginal only slightly recognizable by their larger size from the other aboral plates. Inferomarginal plates slightly smaller than the superomarginals. Aboral plates with a crown of small acicular spine. Marginal and plates of the oral face with an external face entirely covered by spinelets (no paxilla). Spines of the ambulacral groove only slightly larger than those of the other parts. Actinolateral plates extending far, close to the tip of the arm. Actinolateral, marginals and adambulacral plates arranged in transversal rows. Mouth angle plate small. No pedicellariae.|